Scroll-type two stage positive fluid displacement apparatus
US4157234A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1978 |
| Grant date | Jun 5, 1979 |
| Priority date | — |
| Expiry date | Sep 21, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05B2250/50
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention comprises a positive fluid displacement apparatus of the scroll type described as a fluid compressor in the exemplary embodiment. The embodiment has single fixed and movable scroll elements in which the latter orbits the former to form variable volume pockets which move from an inlet to an outlet and means are provided for discharging fluid from at least one of the pockets prior to its movement to the outlet port, cooling the vented fluid and returning it to the apparatus for final compression and discharge. Accordingly, by this arrangement, two stages of compression with intercooling are provided in a single apparatus having only a single fixed scroll element and a single movable scroll element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.